CN214617727U

CN214617727U - Linear actuator

Info

Publication number: CN214617727U
Application number: CN202120063565.XU
Authority: CN
Inventors: 吴伟凡
Original assignee: Jstar Co ltd
Current assignee: Jstar Co ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-11-05
Anticipated expiration: 2031-01-11
Also published as: US11421760B2; US20220221033A1

Abstract

The utility model provides a linear actuator, contains casing, power module, master gear, reinforces seat and screw rod. The shell comprises a first accommodating space, a second accommodating space, an opening and a ring groove, the second accommodating space is communicated with the first accommodating space, the opening is communicated with the second accommodating space, and the ring groove is positioned in the second accommodating space along the axial direction of the opening; the power module is accommodated in the first accommodating space; the main gear is accommodated in the second accommodating space and is linked by the power module; the strengthening seat is arranged in the second accommodating space and is connected with the main gear, the strengthening seat comprises a strengthening seat body and a strengthening seat flange, and the strengthening seat flange is connected with the strengthening seat body and is embedded in the annular groove; one end of the screw rod penetrates through the opening and the main gear and is limited on the strengthening seat, and the screw rod is linked with the main gear. Therefore, the technical effect of lightening the stress of the shell is achieved by the configuration of the reinforced seat.

Description

Linear actuator

Technical Field

The present invention relates to a linear actuator, and more particularly, to a linear actuator having a reinforced seat.

Background

The linear actuator is widely applied to various fields, and a common mechanism is that a screw rod is driven to rotate by a motor, so that a driven device can be driven by the linear actuator to perform linear motion, such as lifting of a lifting table and the like; the screw rotates to generate an axial thrust which directly or indirectly acts on the housing, so that the housing needs to have a certain thickness to avoid damage, which easily causes weight increase and cost increase of the linear actuator.

Therefore, it is an object of the present invention to reduce the housing stress of the linear actuator during operation.

SUMMERY OF THE UTILITY MODEL

According to one embodiment of the present invention, a linear actuator is provided, which includes a housing, a power module, a main gear, a reinforcement seat, and a screw. The shell comprises a first accommodating space, a second accommodating space, an opening and a ring groove, wherein the second accommodating space is communicated with the first accommodating space, the opening is communicated with the second accommodating space, and the ring groove is positioned in the second accommodating space along an axial direction of the opening; the power module is accommodated in the first accommodating space; the main gear is accommodated in the second accommodating space and is linked by the power module; the strengthening base is arranged in the second accommodating space and connected with the main gear, the strengthening base comprises a strengthening base body and a strengthening base flange, and the strengthening base flange is connected with the strengthening base body and embedded in the annular groove; one end of the screw rod penetrates through the opening and the main gear and is limited on the strengthening seat, and the screw rod is linked with the main gear.

Therefore, the structural arrangement of the reinforcing seat can bear the thrust of the screw, and the stress on the shell can be reduced.

According to the above-mentioned linear actuator, the housing further includes at least one groove extending from the annular groove radially outward to an inner wall of the housing; the strengthening seat also comprises at least one extending part which protrudes outwards from the flange of the strengthening seat in the radial direction and is used for being embedded in the at least one groove.

According to the above-mentioned linear actuator, the reinforcing seat further includes a central hole and a bearing limiting portion, the central hole penetrates through the reinforcing seat body; the bearing limiting part is arranged on the strengthening seat body and protrudes out of the central hole in the radial direction; wherein, the screw rod passes through the bearing limiting part and the central hole.

According to the above-mentioned linear actuator, the main gear further includes a fitting hole, the fitting hole is disposed in a main body of the main gear and has an internal thread for screw locking of the screw rod.

According to the above-mentioned linear actuator, the housing further includes a bearing groove disposed in the second receiving space adjacent to the opening, and concentric with the ring groove and the opening; wherein, the screw rod is inserted in the bearing groove, the embedded hole and the central hole.

According to the above-mentioned linear actuator, the linear actuator further comprises a gasket sleeved on one end of the screw rod protruding the strengthening seat.

According to the above-mentioned linear actuator, the linear actuator further comprises a tailstock detachably disposed on the reinforced seat flange and comprising a tailstock body, a tailstock flange and a groove; the tailstock flange is arranged on the tailstock body and is used for connecting the reinforced seat flange; the groove is arranged on the tailstock flange and used for accommodating the gasket.

According to the above-mentioned linear actuator, the tailstock further comprises at least one through hole disposed on the tailstock flange, and the reinforcement base further comprises at least one mounting hole disposed on the reinforcement base flange and corresponding to the through hole; when the tailstock is combined with the strengthening seat, at least one screw penetrates through the through hole and is screwed in the mounting hole, so that the tailstock is fixed on the strengthening seat.

According to the above-mentioned linear actuator, the linear actuator further comprises a lifting structure connected to the screw rod and driven by the rotation of the screw rod.

According to the above-mentioned linear actuator, the housing further includes a first half housing and a second half housing, and the second half housing is combined with the first half housing to form a first accommodating space and a second accommodating space.

Drawings

Fig. 1 shows a schematic perspective view of a linear actuator according to an embodiment of the present invention;

FIG. 2 shows a partially exploded schematic view of the linear actuator of the embodiment of FIG. 1;

FIG. 3 shows a schematic perspective view of the housing of the embodiment of FIG. 1;

FIG. 4 shows a perspective view of the reinforcement base of the embodiment of FIG. 1;

FIG. 5 illustrates a perspective view of the tailstock of the embodiment of FIG. 1;

FIG. 6 shows a partial perspective view of the linear actuator of the embodiment of FIG. 1; and

FIG. 7 illustrates a partial cross-sectional view of the linear actuator of the embodiment of FIG. 1 taken along section line 7-7.

Description of the symbols

10: linear actuator

100: shell body

101: first half shell

102: second half-shell

110: the first containing space

120: the second containing space

130: opening holes

140: ring groove

150: groove

160: bearing groove

200: power module

300: master gear

310: tabling hole

400: reinforced seat

410: reinforced seat body

420: reinforced seat flange

430: extension part

440: center hole

450: bearing position limiting part

460: mounting hole

500: screw rod

600: gasket

700: tailstock

710: tailstock body

720: tailstock flange

730: groove

740: through hole

800: lifting structure

900: screw with a thread

1000: bearing assembly

1100: shaft sleeve

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings. For the purpose of clarity, numerous implementation details are set forth in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and elements are shown in simplified schematic form in the drawings for the sake of simplifying the drawings; and repeated elements will likely be referred to using the same reference number or similar reference numbers.

In addition, when an element (or a mechanism or a module, etc.) is "connected," "disposed" or "coupled" to another element, it can be directly connected, disposed or coupled to the other element, or it can be indirectly connected, disposed or coupled to the other element, that is, there are other elements between the element and the other element. When an element is explicitly connected, directly disposed, or directly coupled to another element, it is intended that no other element is interposed between the element and the other element. The terms first, second, third, etc. are used merely to describe various elements or components, but the elements/components themselves are not limited, so that the first element/component can be also referred to as the second element/component. And the combination of elements/components/mechanisms/modules herein is not a commonly known, conventional or existing combination in the art, and cannot be readily determined by one skilled in the art whether the combination is readily accomplished by determining whether the elements/components/mechanisms/modules themselves are present.

Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic perspective view illustrating a linear actuator 10 according to an embodiment of the present invention; FIG. 2 shows a partially exploded schematic view of the linear actuator 10 of the embodiment of FIG. 1; fig. 3 shows a schematic perspective view of the housing 100 of the embodiment of fig. 1. As shown in fig. 1 to 3, the linear actuator 10 includes a housing 100, a power module 200, a main gear 300, a stiffener seat 400, and a screw 500. The housing 100 includes a first accommodating space 110, a second accommodating space 120, an opening 130 and a ring groove 140, the second accommodating space 120 is communicated with the first accommodating space 110, the opening 130 is communicated with the second accommodating space 120, and the ring groove 140 is located in the second accommodating space 120 along an axial direction of the opening 130; the power module 200 is accommodated in the first accommodating space 110; the main gear 300 is accommodated in the second accommodating space 120 and is linked by the power module 200; the reinforced seat 400 is disposed in the second accommodating space 120 and connected to the main gear 300, the reinforced seat 400 includes a reinforced seat body 410 and a reinforced seat flange 420, the reinforced seat flange 420 is connected to the reinforced seat body 410 and is embedded in the annular groove 140; one end of the screw 500 passes through the opening 130 and the main gear 300 and is limited on the reinforced seat 400, and the screw 500 is linked with the main gear 300.

Therefore, the structural arrangement of the reinforcing seat 400 can receive the thrust of the screw 500, and the stress on the housing 100 can be reduced.

In addition, the main gear 300 may further include a fitting hole 310, and the fitting hole 310 is disposed in a body of the main gear 300 and has an inner thread for the screw 500 to screw.

As shown in fig. 3, the housing 100 may further include a first housing half 101 and a second housing half 102, and the second housing half 102 is combined with the first housing half 101 to form a first receiving space 110 and a second receiving space 120. The ring groove 140 can be divided into two parts, wherein one half is disposed on the first half shell 101, and the other half is disposed on the second half shell 102, when assembling the reinforcement base 400, the reinforcement base flange 420 can be first snapped into the ring groove 140 of the second half shell 102, and then the reinforcement base 400 can be fixed in the shell 100 by combining the first half shell 101 and the second half shell 102. Other parts can also be put into the second half-shell 102 first and then the first half-shell 101 is combined, thereby improving the assembly convenience.

The housing 100 may further include a bearing groove 160 disposed in the second accommodating space 120 adjacent to the opening 130, and concentric with the ring groove 140 and the opening 130, the bearing groove 160 being for accommodating a sleeve 1100; the screw 500 is inserted into the bearing groove 160, the fitting hole 310 and the central hole 440 (see fig. 4) of the reinforcement base 400 through the opening 130, so that the screw 500 rotates on the same axis.

Referring to fig. 4, and referring to fig. 2 and fig. 3 together, fig. 4 is a perspective view illustrating a reinforcement base 400 of the embodiment of fig. 1. As shown in fig. 3 and 4, the casing 100 may further include at least one groove 150 extending from the annular groove 140 to an inner wall of the casing 100; the stiffener seat 400 may further include at least one extension 430 protruding radially outward from the stiffener flange 420 and configured to be engaged with the at least one groove 150 to prevent the stiffener seat 400 from rotating relative to the housing 100.

The stiffener seat 400 may further include a central hole 440 and a bearing stopper 450, wherein the central hole 440 penetrates through the stiffener seat body 410; the bearing position-limiting portion 450 is disposed on the reinforced seat body 410 and radially protrudes out of the central hole 440, and the bearing position-limiting portion 450 is used for limiting the bearing 1000 accommodated in the reinforced seat 400; the screw 500 passes through the bearing stopper 450 and the central hole 440. In addition, the linear actuator 10 may further include a washer 600 sleeved on an end of the screw 500 protruding from the stiffener seat 400. In this embodiment, the bearing 1000 is limited to the reinforcing seat 400, and the end of the screw 500 is limited to the bearing 1000 by a deformation pressing manner (e.g., riveting) after passing through the bearing 1000, but not limited thereto.

Referring to fig. 5 and fig. 6, please refer to fig. 2 and fig. 4 together, wherein fig. 5 illustrates a perspective view of the tailstock 700 of the embodiment of fig. 1; fig. 6 shows a partial perspective view of the linear actuator 10 of the embodiment of fig. 1. As shown in fig. 4 to 6, the linear actuator 10 may further include a tailstock 700 detachably disposed on the reinforced seat flange 420 and including a tailstock body 710, a tailstock flange 720 and a groove 730; the tailstock flange 720 is disposed on the tailstock body 710 and is used to connect the reinforced seat flange 420; the groove 730 is disposed on the tailstock flange 720 and is used for accommodating the gasket 600.

The tailstock 700 may further include at least one through hole 740 disposed on the tailstock flange 720, and the stiffener 400 may further include at least one mounting hole 460 disposed on the stiffener flange 420 and corresponding to the at least one through hole 740; when the tailstock 700 is combined with the reinforcement base 400, at least one screw 900 passes through the at least one through hole 740 and is screwed in the at least one mounting hole 460, so that the tailstock 700 is fixed to the reinforcement base 400. When the user wants to replace the screw 500 according to the actual requirement, for example, by changing the lead, the screw 900 can be directly unscrewed to remove the tailstock 700, thereby improving the convenience of assembly and disassembly.

Referring to fig. 7, fig. 7 shows a partial cross-sectional view of the linear actuator 10 of the embodiment of fig. 1 taken along section line 7-7. As shown in fig. 7, the reinforced seat 400 is fixed in the housing 100 by the reinforced seat flange 420 being inserted into the annular groove 140, and the reinforced seat 400 is accommodated by a bearing 1000, one end of the main gear 300 is inserted into the bearing 1000, and the other end is inserted into the shaft sleeve 1100, and the bearing 1000 and the shaft sleeve 1100 are concentrically arranged, so that the main gear 300 can rotate on the same axis without deflection. The external thread of the screw 500 is screwed with the fitting hole 310 of the main gear 300, and the screw 500 can move with the main gear 300, and the end of the screw 500 protruding out of the reinforced seat 400 is sleeved with a gasket 600 and pressed for limiting. When the screw 500 is driven to rotate, an axial thrust is generated, and the thrust in the opposite direction is generated by repeating the forward rotation and the reverse rotation, which easily causes mechanical fatigue, if a load is applied, the vibration of the casing 100 caused by the thrust is more easily amplified, and the reinforcing seat flange 420 is clamped into the annular groove 140, so that the reinforcing seat 400 shares the stress of the casing 100, and the casing 100 with a small thickness and a small bearing capacity can be used, thereby reducing the weight and the cost.

Referring to fig. 1, the linear actuator 10 may further include a lifting structure 800 connected to the screw 500 and driven by the screw 500. The lifting structure 800 can be used in combination with a device to be driven to move the device linearly along the axial direction of the screw 500 relative to the linear actuator 10, thereby achieving a wide range of applications.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A linear actuator, comprising:

a housing, comprising:

a first accommodating space;

a second accommodating space communicated with the first accommodating space;

an opening communicated with the second accommodating space; and

the annular groove is positioned in the second accommodating space along the axial direction of the opening;

a power module accommodated in the first accommodating space;

a main gear accommodated in the second accommodating space and linked by the power module;

a strengthening seat, which is arranged in the second accommodating space and connected with the main gear, and comprises:

a reinforced base body; and

a reinforced seat flange connected with the reinforced seat body and embedded in the annular groove; and

one end of the screw rod penetrates through the opening and the main gear and is limited on the strengthening seat, and the screw rod is linked by the main gear.

2. The linear actuator of claim 1, wherein the housing further comprises at least one groove extending radially outward from the annular groove to an inner wall of the housing; and the reinforced seat also comprises at least one extending part which protrudes outwards from the flange of the reinforced seat in the radial direction and is used for being embedded in the at least one groove.

3. The linear actuator of claim 1, wherein the stiffener seat further comprises:

a central hole penetrating through the reinforced seat body; and

a bearing limiting part which is arranged on the reinforced seat body and protrudes out of the central hole in the radial direction;

wherein, the screw rod passes through the bearing limiting part and the central hole.

4. The linear actuator of claim 3, wherein the main gear further comprises:

the embedded hole is arranged on a body of the main gear and is provided with an inner thread for the screw rod to be screwed.

5. The linear actuator of claim 4, wherein the housing further comprises:

a bearing groove adjacent to the opening and arranged in the second accommodating space, and concentric with the ring groove and the opening; wherein, the screw rod is inserted in the bearing groove, the tabling hole and the central hole.

6. The linear actuator of claim 1, further comprising:

a gasket, which is sleeved on the end of the screw rod protruding the strengthening seat.

7. The linear actuator of claim 6, further comprising a tailstock detachably disposed on the stiffener seat flange and comprising:

a tailstock body;

the tailstock flange is arranged on the tailstock body and is used for connecting the reinforced seat flange; and

and the groove is arranged on the tailstock flange and is used for accommodating the gasket.

8. The linear actuator of claim 7, wherein the tailstock further comprises at least one through hole disposed on the tailstock flange, and the stiffener seat further comprises at least one mounting hole disposed on the stiffener seat flange and corresponding to the at least one through hole; when the tailstock is combined with the strengthening seat, at least one screw penetrates through the at least one through hole and is screwed in the at least one mounting hole, so that the tailstock is fixed on the strengthening seat.

9. The linear actuator of claim 1, further comprising:

and the lifting structure is connected with the screw rod and is driven by the rotation of the screw rod.

10. The linear actuator of claim 1, wherein the housing further comprises:

a first housing half; and

the second half shell is combined with the first half shell to form the first accommodating space and the second accommodating space.